WPF特效：流光动画效果

WPF特效——流光动画效果

一、代码

 <Window.Resources>  
     
        <Storyboard x:Key="Storyboard1" RepeatBehavior="Forever">
            <PointAnimationUsingKeyFrames Storyboard.TargetProperty="(Shape.Stroke).(LinearGradientBrush.StartPoint)" 
                                          Storyboard.TargetName="rectangle">
                <EasingPointKeyFrame KeyTime="0:0:0.5" Value="0.855,0.148"/>
                <EasingPointKeyFrame KeyTime="0:0:1" Value="0.852,0.855"/>
                <EasingPointKeyFrame KeyTime="0:0:1.5" Value="0.148,0.855"/>
                <EasingPointKeyFrame KeyTime="0:0:2" Value="0.144,0.149"/>
                <EasingPointKeyFrame KeyTime="0:0:2.5" Value="0,0"/>

            PointAnimationUsingKeyFrames>
            <PointAnimationUsingKeyFrames Storyboard.TargetProperty="(Shape.Stroke).(LinearGradientBrush.EndPoint)" 
                                          Storyboard.TargetName="rectangle">
                <EasingPointKeyFrame KeyTime="0:0:0.5" Value="0.145,0.852"/>
                <EasingPointKeyFrame KeyTime="0:0:1" Value="0.148,0.145"/>
                <EasingPointKeyFrame KeyTime="0:0:1.5" Value="0.852,0.145"/>
                <EasingPointKeyFrame KeyTime="0:0:2" Value="0.856,0.851"/>
                <EasingPointKeyFrame KeyTime="0:0:2.5" Value="0,1"/>

            PointAnimationUsingKeyFrames>
        Storyboard>
     
        <Storyboard x:Key="Storyboard2" RepeatBehavior="Forever">
            <PointAnimationUsingKeyFrames Storyboard.TargetProperty="(Shape.Stroke).(LinearGradientBrush.StartPoint)" 
                                          Storyboard.TargetName="rectangle1">
                <EasingPointKeyFrame KeyTime="0:0:0.5" Value="0.855,0.148"/>
                <EasingPointKeyFrame KeyTime="0:0:1" Value="0.852,0.855"/>
                <EasingPointKeyFrame KeyTime="0:0:1.5" Value="0.148,0.855"/>
                <EasingPointKeyFrame KeyTime="0:0:2" Value="0.144,0.149"/>
                <EasingPointKeyFrame KeyTime="0:0:2.5" Value="0,0"/>

            PointAnimationUsingKeyFrames>
            <PointAnimationUsingKeyFrames Storyboard.TargetProperty="(Shape.Stroke).(LinearGradientBrush.EndPoint)" 
                                          Storyboard.TargetName="rectangle1">
                <EasingPointKeyFrame KeyTime="0:0:0.5" Value="0.145,0.852"/>
                <EasingPointKeyFrame KeyTime="0:0:1" Value="0.148,0.145"/>
                <EasingPointKeyFrame KeyTime="0:0:1.5" Value="0.852,0.145"/>
                <EasingPointKeyFrame KeyTime="0:0:2" Value="0.856,0.851"/>
                <EasingPointKeyFrame KeyTime="0:0:2.5" Value="0,1"/>

            PointAnimationUsingKeyFrames>
        Storyboard>
     
        <Storyboard x:Key="Storyboard3" RepeatBehavior="Forever">
            <PointAnimationUsingKeyFrames Storyboard.TargetProperty="(Shape.Stroke).(LinearGradientBrush.StartPoint)" 
                                          Storyboard.TargetName="rectangle2">
                <EasingPointKeyFrame KeyTime="0:0:0.5" Value="0.855,0.148"/>
                <EasingPointKeyFrame KeyTime="0:0:1" Value="0.852,0.855"/>
                <EasingPointKeyFrame KeyTime="0:0:1.5" Value="0.148,0.855"/>
                <EasingPointKeyFrame KeyTime="0:0:2" Value="0.144,0.149"/>
                <EasingPointKeyFrame KeyTime="0:0:2.5" Value="0,0"/>

            PointAnimationUsingKeyFrames>
            <PointAnimationUsingKeyFrames Storyboard.TargetProperty="(Shape.Stroke).(LinearGradientBrush.EndPoint)" 
                                          Storyboard.TargetName="rectangle2">
                <EasingPointKeyFrame KeyTime="0:0:0.5" Value="0.145,0.852"/>
                <EasingPointKeyFrame KeyTime="0:0:1" Value="0.148,0.145"/>
                <EasingPointKeyFrame KeyTime="0:0:1.5" Value="0.852,0.145"/>
                <EasingPointKeyFrame KeyTime="0:0:2" Value="0.856,0.851"/>
                <EasingPointKeyFrame KeyTime="0:0:2.5" Value="0,1"/>

            PointAnimationUsingKeyFrames>
        Storyboard>
    Window.Resources>
    <Window.Triggers>
        
        <EventTrigger RoutedEvent="FrameworkElement.Loaded">
            <BeginStoryboard Storyboard="{StaticResource Storyboard1}"/>
        EventTrigger>
        
        <EventTrigger RoutedEvent="FrameworkElement.Loaded">
            <BeginStoryboard Storyboard="{StaticResource Storyboard2}"/>
        EventTrigger>
        
        <EventTrigger RoutedEvent="FrameworkElement.Loaded">
            <BeginStoryboard Storyboard="{StaticResource Storyboard3}"/>
        EventTrigger>
    Window.Triggers>
    <Grid> 
        
        <Rectangle x:Name="rectangle" Width="300" Height="300" 
                   StrokeThickness="3">
            <Rectangle.Stroke>
                <LinearGradientBrush  Opacity="0.6">
                    <GradientStop Color="Transparent" Offset="0"/>
                    <GradientStop Color="Violet"  Offset="1"/>
                LinearGradientBrush>
            Rectangle.Stroke>

        Rectangle>
        
        <Rectangle x:Name="rectangle1" Width="200" Height="200" 
                   StrokeThickness="3">
            <Rectangle.Stroke>
                <LinearGradientBrush  Opacity="0.6">
                    <GradientStop Color="Transparent" Offset="0"/>
                    <GradientStop Color="Green"  Offset="1"/>
                LinearGradientBrush>
            Rectangle.Stroke>

        Rectangle>
        
        <Rectangle x:Name="rectangle2" Width="100" Height="100" 
                   StrokeThickness="3">
            <Rectangle.Stroke>
                <LinearGradientBrush  Opacity="0.6">
                    <GradientStop Color="Transparent" Offset="0"/>
                    <GradientStop Color="red"  Offset="1"/>
                LinearGradientBrush>
            Rectangle.Stroke>

        Rectangle>

    Grid>

二、特效

(可惜现在本机没有安装生成Gif图片的软件)